I would say 20-22k. It's only worth what the right buyer is willing to pay. You can ask what you like for it really, what you ask and what you end up actually getting for a particular car are two very different things. All depends how strong a money you advertise the car for.If it's what you consider reasonable/fair money you may end up with the full asking price.
2wd sapp with that mileage, colour and condition is gonna command strong money in my opinion.
I hope this helps a little.

CheeRS.Lee.